Internal-combustion engine



Oct. 5 1926.

G- F. LYBECK INTERNAL COMBUSTION ENGINE Filed May 192 Patented Oct. 5,1926.

PATENT OFFICE.

GUN NAB FREDRIK LYBECK, OF AUGUSTENDAL, NEAR STOCKHOLM, SWEDEN.

INTERNAL-COMBUSTION ENGINE.

Application filed May 4, 1926, Serial No. 106,678, and in Sweden April15, 1925.

This invention relates to internal combustion engines having one or morepairs of cylinders in which the combustion chambers of each pair areprovided with ignitlon tubes which for starting purposes may be heatedexternally by a common heating device,

According to this invention the Ignition tubes are made readilyaccessible and remov able independently of each other and with outnecessitating any dismounting of the cylinder by being placed in alaterally through extending space between the combustion chambers of therespective pair of cylinders on opposite sides of the connecting linebetween the centers of said chambers.

The invention is illustrated in the accompanying drawing, Fig. 1 is aside elevation of the uppermost portion of a two cylinder engineaccording to the invention. Fig. 2 is a plan view of the engine and,Fig. 3 1s a cross section on a larger scale taken on the line A-A, Fig.2.

The engine illustrated comprises two cyl inders 1 having individualcombustion chambers 2. The combustion chambers form between themselves alaterally through extending space. In the sides of the combustionchambers facing said space each chamber is provided with an ignitiontube 3 adapted to be heated externally, as by a heating lamp when theengine is to be started. To this end the tubes project into said spacewith their rear parts and are related as closely as possible to eachother, yet so that .they may be removed independently of each other. Tothis end they are displaced relatively to each other sufiiciently to getfree of each other when removed. At the same time care should be takento place the tubes in a suitable position relatively to the respectivecombustion chambers and the injecting nozzles thereof.

In the drawing, the ignition tubes are shown as situated side by side insuch a way that their center lines will form an angle with theconnecting line between the centers of the combustion chambers. Ifdesired, however, they may also be positioned in any other appropriateway, as, for instance, one above the other. In order to utilize in themost efiicient Way the heat of the heating device the said space may becovered by a cap 4t having a hole at 5 to enable insertion of theheating lamp or its burner. To still more increase the heating efiect ashield 6 may be provided within the cap at that side or the ignitiontubes remote from said hole.

The ignition tubes will be freely accessible after removal or" the cap4- and may be uuscrewed and removed individually without necessitatingany dismounting or removal of the combustion chambers.

lVhat I claim is:

1. In an internal combustion engine a pair of cylinders havingindividual combustion chambers so arranged as to form a space betweenthemselves, ignition tubes inserted into the walls of said chambers soas to extend with their rear ends into said space, said ignition tubesbeing so positioned relatively to each other as to enable independent removal and insertion of each tube without necessitating any dismantlingof the combustion chamber. 1

2. In an internal combustion engine a pair of cylinders havingcombustion chambers so arranged as to form a transversely throughextending space between themselves, ignition tubes inserted into thewalls of said chambers so as to extend with their rear ends into saidspace, said ignition tubes being situated or" opposite sides of theconnecting line between the centers of said chambers. 3. In an internalcombustion engine a pair of cylinders having combustion chambers soarranged as to form a transversely through extending space betweenthemselves, ignition tubes inserted into the walls or" said chambers soas to extend with their rear ends into said space, said ignition tubesbeing situated at opposite sides of the connecting line between thecenters of said chambers substantially parallel to each other.

4:. In an internal combustion engine a pair of cylinders havingindividual combustion chambers so arranged as to form a space be tweenthemselves, a cap covering said space, independently removable ignitiontubes inserted in the walls of said chamber so as to extend with theirrear ends into said space.

said cap having a hole to permit introduction of heating means.

5. In an internal combustion engine a pair of cylinders havingindividual combustion chambers s0 arranged as to form a space betweenthemselves, a cap covering said 5 space having a hole formed in it,independently removable ignition tubes inserted into the Walls of saidchambers so as to extend with their rear ends into said space, and ashield Within said cap behind sald ignition tubes as seen from saldhole.

In testimony whereof I have signed my name.

GUNNAR FREDRIK LYBECK.

